preexperiment

adj

1. (not-comparable)Before an experiment takes place.

noun

1. A simple form of research that examines a group or groups before and after an event, to see whether there is change, but does not employ a control group.

   “A study that uses only a manipulation is considered a pre-experiment. As the name implies, a pre-experiment has not quite achieved the level of control necessary to be termed an experiment at all.”

   “Campbell and Stanley describe three forms of preexperiments: the one-shot case study, the one-group pretest–posttest design, and the static-group comparison.”